Discharge valve assembly



FIG. 1 is a top perspective view of a discharge valve assembly showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a right side elevation view thereof, the left side elevation view, front elevation view and rear elevation view being a mirror image thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a top plan view thereof.

The broken lines shown in the figures are included for the purpose of illustrating environment and form no part of the claimed design. 

CLAIM The ornamental design for a discharge valve assembly, as shown and described. 